US20070069170A1 - Throttle device and motor therefor - Google Patents
Throttle device and motor therefor Download PDFInfo
- Publication number
- US20070069170A1 US20070069170A1 US10/580,113 US58011303A US2007069170A1 US 20070069170 A1 US20070069170 A1 US 20070069170A1 US 58011303 A US58011303 A US 58011303A US 2007069170 A1 US2007069170 A1 US 2007069170A1
- Authority
- US
- United States
- Prior art keywords
- motor
- projections
- throttle
- casing
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/107—Manufacturing or mounting details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
- F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
- F02D9/1035—Details of the valve housing
- F02D9/105—Details of the valve housing having a throttle position sensor
Definitions
- This invention relates to a throttle device and a motor therefor used to control the flow rate of air flowing into a cylinder of an internal-combustion engine.
- a throttle device wherein throttle valves disposed in an air-intake passage of a throttle body are electrically driven by a motor is already known.
- a body of the motor is housed in a motor casing, and the throttle body and the motor casing are formed as a single piece.
- the rear end of the motor is held by adding components to the rear end of such a motor.
- a washer is used to hold the rear end of a motor.
- the washer is a ring of a plate spring.
- the washer has an inner edge (the plate spring) which is flexible in an axial direction by making slits in a radial direction thereof.
- the washer is press-fitted into a position close an inner bottom (a deep recess position) of the motor casing in advance of inserting the motor into the motor casing. Then, when the motor is inserted into the motor casing, the rear end side portion of the motor is inserted into inner circumference of the washer, causing the inner cut zone of the washer to bend backward.
- the rear end of the motor is held in its radial directions by the washer.
- the motor when the motor is inserted into the motor, casing to bend the inner cut zone of the washer backward. During such motor insertion process, the outside of the motor body (yoke) may be scraped by the inner edge of the washer, and metal scraps may be produced.
- the motor when inserting the motor into the motor casing, the motor may be inserted having dislingnment and held in such a state because there is no means of aligning the center of the rear end of the motor.
- the disalignment of the center line of the motor with the center line of the motor casing means the disalignment of the motor's driving gears with a pinion gear and an intermediate gear and causes an error in mounting the motor.
- the elastic O-ring when the motor with the elastic O-ring is inserted into the motor casing, the elastic O-ring may be distorted or damaged.
- the object of the present invention is to provide a throttle device with a motor, which is free from the above problems and of relatively simple construction.
- the motor in a throttle device with a motor for driving a throttle valve, the motor is housed in a motor casing provided in a throttle body. Additionally, an output-shaft side of the motor (here, it's also called as “front side or front end”) is held in its radial directions in the vicinity of the motor casing's opening for inserting the motor into the motor casing. Another side (it's also called “rear side” or “rear end”) opposite to the output shaft is provided with projections (elastic projections, for example), which are deformed inwardly in a radial directions.
- the motor and the elastic projections are formed in a single piece, or the elastic projections are attached to the motor body. According to the deformation of the projection, the projections contact to the inside surface of the motor casing adding pressure, the rear end of the motor is held and fixed in its radial direction in the motor casing.
- the elastic projections may be bent projections or lugs arranged circumferentially of the rear end of the motor.
- the motor is aligned with the motor casing immediately before the motor body is fully inserted into the motor casing; therefore, the motor can be properly aligned (alignment in its radial direction) with the throttle body.
- the portion on the output-shaft side in the motor body is fixed to the throttle body, and the rear side of the motor body is held and fixed in its radial directions by the pressed-down (preferably elastic) projections in the motor casing; therefore, the motor's vibration in its radial directions is held down.
- the vibration resistance of the motor is improved.
- the rear side portion of the motor is held and fixed inside the casing by the elasticity of the pressed-down elastic projections.
- the rear side portion of the motor may be held and fixed by similar projections, for example, which are press-fitted into the motor casing to be physically deformation.
- FIG. 1 is a sectional view of a typical motor-driven throttle device (a device for controlling air intake for internal-combustion engines) of the present invention
- FIG. 2 is a perspective view of the throttle device of FIG. 1 ; wherein a section of part of the unit (motor casing) 1 b is shown, and a perspective view of the throttle actuator (motor) removed from the motor casing is presented;
- FIG. 3 is an illustration of the steps in the process of inserting the motor into the throttle body and assembling them.
- FIGS. 4 to 8 are partially sectional views of other embodiments of the present invention.
- FIG. 1 is a sectional view of a typical motor-driven throttle devise (a device for controlling air intake flow rate for internal-combustion engines) of the present invention.
- FIG. 2 is a perspective view of the throttle device of FIG. 1 , wherein a part (motor casing) 1 b of the device 1 b is shown with a section view, and the throttle actuator (motor) removed from the motor casing 1 b is shown with a perspective view.
- FIG. 3 is an illustration of the steps in the process of inserting the motor into the throttle body and assembling them.
- the throttle body 1 shown in FIGS. 1 to 3 is made by aluminum die-casting. Formed inside the throttle body 1 is a bore serving as an air-intake passage 1 a . A throttle valve 2 is disposed in the air-intake passage 1 a.
- the throttle valve 2 is fixed to a throttle shaft 3 , which is supported through the throttle body 1 , by set screws 4 .
- the throttle shaft 3 is supported rotatably with bearings 5 a and 5 b .
- the bearing 5 a is held by the throttle body 1 and a retainer plate 6 a .
- the bearing 5 b is held by the throttle body 1 and a retainer plug 6 b and one end face is covered.
- a motor casing 1 b is molded integrally together with the throttle body 1 a .
- the yoke (motor body) 71 of the motor 7 for driving the throttle valve is inserted into the motor casing 1 b.
- the motor 7 has an output shaft 70 in which one end (front side) protrude thorough the end bracket, and the output shaft 70 a is provided with a pinion 8 for transmitting power from the motor 7 to the throttle shaft 3 .
- An intermediate gear 9 for transmitting power from the motor is fitted on a shaft 11 being press-fitted into the throttle body 1 .
- a throttle gear 10 is fixed on the front end of the throttle shaft 3 by a skirt nut 12 .
- the gears 8 , 9 , and 10 constitute a reduction device for transmitting power from the motor 7 to the throttle shaft 3 . They are covered in a sealed state with a packing 14 and a gear cover 13 attached to the throttle body 1 .
- the gear cover 13 is made of synthetic resin.
- the gear cover 13 has a metal motor-driving terminal 13 a and a throttle-sensor terminal 13 b , the terminals 13 a and 13 b together provided into the cover 13 by insert molding. In this way, the gear cover is provided with a so-called directly mounting connector 13 c and a throttle sensor.
- the throttle sensor has a rotor 20 and a resistor 19 .
- the rotor 20 is fitted to one end side part of the throttle shaft 3 .
- the rotor 20 has a brush 13 b , which is in contact with the resistor 19 of the sensor.
- the throttle-sensor resistor 19 and the throttle-sensor terminal 18 are held by U-clip having spring elasticity. Thus, the resistor 19 and the throttle-sensor terminal 18 are electrically connected by mechanical contact.
- the art of driving and controlling a throttle valve with an electric motor is well known; therefore, the explanation of the art is omitted.
- a numeral 15 is a return spring
- a numeral 16 is a default lever
- a numeral 17 is a default spring
- a motor body 71 is inserted into the motor casing 1 b through a motor-insertion opening 73 .
- the one end portion 72 (flange 7 b ) on the output shaft side of the motor 7 is held and fixed in its radial direction in the vicinity of the motor-insertion opening 73 of the motor casing 1 b .
- the other end portion 74 opposite to the output shaft side of the motor 7 is held in motor's radial direction by the inner surface of the motor casing 1 b through the use of elastic pieces 7 c (it may be so “flexible pieces”; refer to FIGS. 2 and 3 ).
- the motor body and the elastic pieces are formed in a single-piece design (or the elastic pieces are attached to the motor as shown in other embodiments to be described later).
- the elastic pieces are elastic-deformed inwardly in the radial direction of the motor by pressure from the inner surface of motor casing 1 b.
- the elastic pieces (namely flexible pieces or springy pieces) 7 c and a bearing bracket 7 a opposite to an output-shaft side (rear end) of the motor are formed in a single-piece design.
- the elastic 7 c are configured by bent-pieces which are formed on an outer edge of the bearing bracket 7 a by sheet-metal working.
- the number and arrangement of spring pieces 7 c are not limited to them.
- the bent pieces 7 c extend radially from the outer edge of the bearing bracket in a state before bending working, and they are formed by being bent from the motor rear side toward the motor front side (output-shaft side of the motor). The bending direction of the bent pieces is opposite to the direction of inserting the motor.
- Each bent piece 7 c has a curved surface (see FIG. 3 ).
- part of the curved outer surfaces of the bent pieces 7 c come into contact with a tapered surface 1 f inside the motor casing 1 b and are pressed down inwardly in the radial direction of the motor.
- the bent pieces 7 c are elastically deformed (flexibly deformed) inwardly in the directions of the motor. Due to such elastic deformation, the bent pieces 7 c come into notches 75 which are made in the yoke 71 of the motor 7 .
- the motor casing 1 b is configured by a cylindrical casing in which one end thereof is closed, and the other end thereof is provided with the motor-insertion opening 73 .
- Inside of the motor casing 1 b has a tapered surface ( 1 e , 1 f ) tapering down from the motor 7 -insertion opening side to toward the side opposite to the motor-insertion opening.
- the tapered surface is configured with a first tapered surface part 1 e making up a sizable proportion thereof (it extends from the motor-insertion opening side toward the deep recess-portion of the motor casing) and a second tapered surface part 1 f following the first tapered surface part 1 e at the deep recess-portion.
- the slope of the second tapered surface 1 f is larger than that of the first tapered surface 1 e .
- the rear end of the motor 7 is positioned at the non-tapered inner surface part 1 c between the second tapered surface part 1 f and the rear end (inner bottom) 1 h of the motor casing 1 b as shown in FIGS. 1 and 3 .
- the non-tapered inner surface part 1 c is formed in a straight cylindrical-inner surface shape.
- the sum diameter R 1 is smaller than the inner diameter R 3 at any point of the range from the first tapered surface part 1 e up to a position immediately before the halfway point “P” of the second tapered surface part 1 f . Accordingly, the bent pieces 7 c come into contact with the second tapered surface 1 f immediately before the motor 7 is fully inserted into the motor casing 1 b as shown in FIG. 3 ( 3 ). Then, as the motor 7 is fully inserted into the motor casing 1 b , the bent pieces 7 c are pressed down by the second tapered surface part 1 f and are elastically deformed in the inner radial direction of the motor.
- bent pieces 7 c have a curved outer surface, their curved outer surfaces comes into contact with the second tapered surface 1 f of the motor casing 1 b and, thus, the bent pieces 7 c are pressed down.
- a motor guide 1 d for guiding motor inserting are formed in the vicinity of the motor-insertion opening 73 of the motor casing 1 b .
- the motor guide 1 d is configured by plural guide projections formed in the vicinity of the motor-insertion opening 73 , and have arc-shaped inner faces respectively.
- the end on the output-shaft side of the motor 7 is restrained in the radial direction by the ark-shaped inner face of the motor guide 1 d (for example, a part 7 b ′ (see FIG. 2 ) of a motor-mounting flange 7 b of the motor body 71 are put into contact with the arc-shaped inner faces of the motor guide 1 d ).
- Parts 7 b ′′ (the parts made longer than the part 7 b ′ in the radial direction) of the flange 7 b are positioned between motor guide projections 1 d .
- Each parts 7 b ′′ has a screw-through hole 80 (see FIG. 2 ), and the motor 7 is secured to the throttle 1 by screws using the screw-through holes 80 .
- the parts 7 b ′ (having smaller diameters than the parts 7 b ′′) of the flange 7 b are clearance-fitted into the motor-guide (flange guide) 1 d immediately before the motor 7 is fully inserted into the motor casing 1 b .
- the end on the output-shaft side 72 of the motor 7 is fixed in its radial direction.
- the reference sign “L 1 ” is a distance from a point p 1 to the end of the motor guide projections (motor guide) 1 d .
- the point P 1 is a point where elastic pieces (bent pieces) 7 c of the motor 7 first come into contact with the second tapered surface 1 f during the motor insertion process.
- “L 2 ,” is a distance from the point “P” to the flange 7 b on the output-shaft side.
- L 1 is equal to or larger than L 2 ).
- FIG. 3 ( 1 ) shows the position of the motor 7 immediately before it is fully inserted into the motor casing 1 b , namely the position of the motor 7 where the bent pieces 7 c reach the contact point “P” on the second tapered surface 1 f .
- L 1 is not shorter than L 2
- the outer edge of the flange 7 b is clearance-fitted into inner faces of the motor guide projections 1 d.
- the motor flange 7 b is supported by the motor guide projections 1 d .
- the center of the end 74 opposite to the output-shaft side of the motor 7 is aligned with the center of the motor casing 1 b by the bent pieces 7 c coming into contact with the second tapered surface 1 f.
- the bent pieces 7 c are pressed down by the second tapered surface 1 f and, then, by the non-tapered inner surface 1 c as shown in FIG. 3 ( 3 ) and are elastically deformed (flexibly deformed) inwardly of the radial direction of the motor.
- the bent pieces 7 c partially enter the notches 75 and the rear end 74 of the motor body 71 is firmly held in the inner surface 1 c of the motor casing by the elasticity (springy force) of the pressed-down bent pieces 7 c.
- the precision in assembling the motor 7 and vibration resistance of the motor 7 are improved.
- the bent pieces 7 c and the motor 7 are formed as a single piece, the number of parts is relatively small and the assembling process of the motor 7 is relatively simple.
- the elastic pieces 7 c have a curved outer surface and the halfway parts of curved outer surfaces are pressed down by the second tapered surface 1 f (inside of the casing), the elastic pieces 7 c do not scrape the inside of the motor casing 1 b , producing no metal scraps.
- FIGS. 4 to 8 are partially sectional views of other embodiments of the present invention.
- the same reference numerals and signs commonly used between FIGS. 1 to 3 stand for the same components and elements. The differences from the first embodiment will be described below.
- the motor body 71 as a yoke is provided with elastic pieces 7 e .
- the elastic pieces 7 e such as lugs are formed by cutting and raising parts of the yoke 71 of the motor 7 .
- the elastic pieces 7 e are arranged in a circumferential direction of the yoke 71 .
- the relation between “L 1 ” and “L 2 ” of the first embodiment that “L 1 ” is not shorter than “L 2 ” holds true in this embodiment.
- the yoke 7 is fitted with a ring (apart different from the yoke) 7 f ′ with elastic pieces (flexible pieces like plate springs) 7 f .
- the elastic projections (lugs) 7 f are formed and arranged in a circumferential direction of the ring 7 f ′ by cutting parts of the ring 7 f ′ in the shape of a lug and raising them.
- the bearing boss 77 at the rear end of the motor 7 is fitted with a ring 7 g ′ with elastic pieces 7 g (or elastic projections).
- This ring 7 g ′ has the same workings and effect as the rings of the other embodiments.
- the contact point “P” of the elastic pieces 7 g is somewhere on the inner surface of the boss 77 .
- the previously described relation between “L 1 ” and “L 2 ” that “L 1 ” is not shorter than “L 2 ” holds true in this embodiment.
- the present embodiment has the same workings and effect as those of the previously described embodiments.
- FIGS. 7 and 8 show other embodiments.
- one end of the yoke 7 is provided with a circumferential groove 79 , and an O-ring (elastic member) 15 a is fitted therein.
- the O-ring has the same effect as that of the previously described elastic pieces.
- the previously described relation between “L 1 ” and “L 2 ” that “L 1 ” is not shorter than “L 2 ” also holds true in this embodiment.
- the bearing boss 78 at the rear end of the yoke 7 is provided with a circumferential groove 79 ′, and an O-ring 15 b is fitted therein.
- the contact point “P” of the O-ring 15 b is somewhere on the inner surface of the boss 78 .
- the previously described relation between “L 1 ” and “L 2 ” that the L 1 is not shorter than “L 2 ” also holds true in this embodiment.
- the present embodiment has the same workings and effect as those of the previously described embodiments.
- the elastic pieces, rings, etc. may be made of synthetic resin. The present invention is not limited to the above embodiments, and various types of elastic pieces, elastic projections, etc. are applicable.
- a throttle device and a motor therefor in which vibration resistance of the motor and the precision in assembling the motor (precision of alignment of the motor) are improved with simple configuration can be provided.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
- This invention relates to a throttle device and a motor therefor used to control the flow rate of air flowing into a cylinder of an internal-combustion engine.
- A throttle device wherein throttle valves disposed in an air-intake passage of a throttle body are electrically driven by a motor is already known. A body of the motor is housed in a motor casing, and the throttle body and the motor casing are formed as a single piece.
- Proposed is the art of improving vibration resistance of such a body of the motor by fixing its front and rear ends in its radial direction (Both-end supporting structure). The following mechanisms for holding the output shaft and the rear end (an end opposite to the output-shaft side) of such a motor are disclosed.
- According to Japanese Patent Laid-Open Nos. 2002-339766 and H10-252510, the rear end of the motor is held by adding components to the rear end of such a motor.
- To put it more concretely, according to Japanese Patent Laid-Open No. 2002-339766, a washer is used to hold the rear end of a motor. The washer is a ring of a plate spring. The washer has an inner edge (the plate spring) which is flexible in an axial direction by making slits in a radial direction thereof. The washer is press-fitted into a position close an inner bottom (a deep recess position) of the motor casing in advance of inserting the motor into the motor casing. Then, when the motor is inserted into the motor casing, the rear end side portion of the motor is inserted into inner circumference of the washer, causing the inner cut zone of the washer to bend backward. Thus, the rear end of the motor is held in its radial directions by the washer.
- On the other hand, according to Japanese Patent Laid-Open No. H10-252510, the rear end of a motor is inserted into an elastic O-ring and the motor with the elastic O-ring is inserted into the motor casing. Thus, the rear end of the motor is held in its radial directions by the elastic O-ring in the motor casing.
- In the case of the former prior art, when the motor is inserted into the motor, casing to bend the inner cut zone of the washer backward. During such motor insertion process, the outside of the motor body (yoke) may be scraped by the inner edge of the washer, and metal scraps may be produced. In addition, when inserting the motor into the motor casing, the motor may be inserted having dislingnment and held in such a state because there is no means of aligning the center of the rear end of the motor. The disalignment of the center line of the motor with the center line of the motor casing means the disalignment of the motor's driving gears with a pinion gear and an intermediate gear and causes an error in mounting the motor.
- In the case of the latter prior art, when the motor with the elastic O-ring is inserted into the motor casing, the elastic O-ring may be distorted or damaged.
- The object of the present invention is to provide a throttle device with a motor, which is free from the above problems and of relatively simple construction.
- According to the present invention, in a throttle device with a motor for driving a throttle valve, the motor is housed in a motor casing provided in a throttle body. Additionally, an output-shaft side of the motor (here, it's also called as “front side or front end”) is held in its radial directions in the vicinity of the motor casing's opening for inserting the motor into the motor casing. Another side (it's also called “rear side” or “rear end”) opposite to the output shaft is provided with projections (elastic projections, for example), which are deformed inwardly in a radial directions. The motor and the elastic projections are formed in a single piece, or the elastic projections are attached to the motor body. According to the deformation of the projection, the projections contact to the inside surface of the motor casing adding pressure, the rear end of the motor is held and fixed in its radial direction in the motor casing.
- The elastic projections may be bent projections or lugs arranged circumferentially of the rear end of the motor.
- With the above configuration, the motor is aligned with the motor casing immediately before the motor body is fully inserted into the motor casing; therefore, the motor can be properly aligned (alignment in its radial direction) with the throttle body.
- When the motor is further inserted (fully inserted) into the motor casing, the elastic projections of the end opposite to the output-shaft side (rear end) of the motor are pressed down in the radial direction of the motor by the inside surface of the motor casing; thus, the rear end of the motor is held and fixed in its radial directions in the motor casing, the motor output shaft is kept precisely in parallel with an intermediate gear shaft and a throttle valve shaft. Therefore, the motor gear engages with the intermediate gear in good condition. That is, this arrangement is prevent from disalignment of the motor and no good mesh of gears with no good gear pitch due to such disalignment. As described above, the portion on the output-shaft side in the motor body is fixed to the throttle body, and the rear side of the motor body is held and fixed in its radial directions by the pressed-down (preferably elastic) projections in the motor casing; therefore, the motor's vibration in its radial directions is held down. Thus, the vibration resistance of the motor is improved. As described above, the rear side portion of the motor is held and fixed inside the casing by the elasticity of the pressed-down elastic projections. Alternatively, the rear side portion of the motor may be held and fixed by similar projections, for example, which are press-fitted into the motor casing to be physically deformation.
-
FIG. 1 is a sectional view of a typical motor-driven throttle device (a device for controlling air intake for internal-combustion engines) of the present invention; -
FIG. 2 is a perspective view of the throttle device ofFIG. 1 ; wherein a section of part of the unit (motor casing) 1 b is shown, and a perspective view of the throttle actuator (motor) removed from the motor casing is presented; -
FIG. 3 is an illustration of the steps in the process of inserting the motor into the throttle body and assembling them; and - FIGS. 4 to 8 are partially sectional views of other embodiments of the present invention.
- By referring to the drawings, a preferred embodiment of the present invention will be described below.
-
FIG. 1 is a sectional view of a typical motor-driven throttle devise (a device for controlling air intake flow rate for internal-combustion engines) of the present invention.FIG. 2 is a perspective view of the throttle device ofFIG. 1 , wherein a part (motor casing) 1 b of thedevice 1 b is shown with a section view, and the throttle actuator (motor) removed from themotor casing 1 b is shown with a perspective view.FIG. 3 is an illustration of the steps in the process of inserting the motor into the throttle body and assembling them. - The throttle body (also referred to as “main body” or “bore body”) 1 shown in FIGS. 1 to 3 is made by aluminum die-casting. Formed inside the
throttle body 1 is a bore serving as an air-intake passage 1 a. Athrottle valve 2 is disposed in the air-intake passage 1 a. - The
throttle valve 2 is fixed to athrottle shaft 3, which is supported through thethrottle body 1, by setscrews 4. Thethrottle shaft 3 is supported rotatably withbearings bearing 5 a is held by thethrottle body 1 and aretainer plate 6 a. The bearing 5 b is held by thethrottle body 1 and aretainer plug 6 b and one end face is covered. - A
motor casing 1 b is molded integrally together with thethrottle body 1 a. The yoke (motor body) 71 of themotor 7 for driving the throttle valve is inserted into themotor casing 1 b. - The
motor 7 has anoutput shaft 70 in which one end (front side) protrude thorough the end bracket, and the output shaft 70 a is provided with apinion 8 for transmitting power from themotor 7 to thethrottle shaft 3. - An
intermediate gear 9 for transmitting power from the motor is fitted on ashaft 11 being press-fitted into thethrottle body 1. Athrottle gear 10 is fixed on the front end of thethrottle shaft 3 by askirt nut 12. Thegears motor 7 to thethrottle shaft 3. They are covered in a sealed state with apacking 14 and agear cover 13 attached to thethrottle body 1. - The
gear cover 13 is made of synthetic resin. Thegear cover 13 has a metal motor-driving terminal 13 a and a throttle-sensor terminal 13 b, theterminals cover 13 by insert molding. In this way, the gear cover is provided with a so-called directly mountingconnector 13 c and a throttle sensor. The throttle sensor has arotor 20 and aresistor 19. Therotor 20 is fitted to one end side part of thethrottle shaft 3. Therotor 20 has abrush 13 b, which is in contact with theresistor 19 of the sensor. The throttle-sensor resistor 19 and the throttle-sensor terminal 18 are held by U-clip having spring elasticity. Thus, theresistor 19 and the throttle-sensor terminal 18 are electrically connected by mechanical contact. The art of driving and controlling a throttle valve with an electric motor is well known; therefore, the explanation of the art is omitted. - As shown in
FIG. 1 , a numeral 15 is a return spring, a numeral 16 is a default lever, and a numeral 17 is a default spring. - The arrangement for holding the
motor 7 for the throttle device will be detailed below. - In the
motor 7 of the present embodiment, amotor body 71 is inserted into themotor casing 1 b through a motor-insertion opening 73. The one end portion 72 (flange 7 b) on the output shaft side of themotor 7 is held and fixed in its radial direction in the vicinity of the motor-insertion opening 73 of themotor casing 1 b. Theother end portion 74 opposite to the output shaft side of themotor 7 is held in motor's radial direction by the inner surface of themotor casing 1 b through the use ofelastic pieces 7 c (it may be so “flexible pieces”; refer toFIGS. 2 and 3 ). The motor body and the elastic pieces are formed in a single-piece design (or the elastic pieces are attached to the motor as shown in other embodiments to be described later). The elastic pieces are elastic-deformed inwardly in the radial direction of the motor by pressure from the inner surface ofmotor casing 1 b. - As shown in
FIG. 2 , the elastic pieces (namely flexible pieces or springy pieces) 7 c and abearing bracket 7 a opposite to an output-shaft side (rear end) of the motor are formed in a single-piece design. The elastic 7 c are configured by bent-pieces which are formed on an outer edge of thebearing bracket 7 a by sheet-metal working. Although there are four elastic pieces (bent pieces like metal plate springs) 7 c at evenly spaced intervals inFIG. 2 , the number and arrangement ofspring pieces 7 c are not limited to them. - The
bent pieces 7 c extend radially from the outer edge of the bearing bracket in a state before bending working, and they are formed by being bent from the motor rear side toward the motor front side (output-shaft side of the motor). The bending direction of the bent pieces is opposite to the direction of inserting the motor. Eachbent piece 7 c has a curved surface (seeFIG. 3 ). - Immediately before the
motor 7 is fully inserted into themotor casing 1 b, part of the curved outer surfaces of thebent pieces 7 c come into contact with atapered surface 1 f inside themotor casing 1 b and are pressed down inwardly in the radial direction of the motor. - The above pressing will be detailed later when the process of installing the motor body into the motor casing is described by referring to
FIG. 3 . When pressed down, thebent pieces 7 c are elastically deformed (flexibly deformed) inwardly in the directions of the motor. Due to such elastic deformation, thebent pieces 7 c come intonotches 75 which are made in theyoke 71 of themotor 7. - The
motor casing 1 b is configured by a cylindrical casing in which one end thereof is closed, and the other end thereof is provided with the motor-insertion opening 73. Inside of themotor casing 1 b has a tapered surface (1 e, 1 f) tapering down from the motor 7-insertion opening side to toward the side opposite to the motor-insertion opening. In this embodiment, the tapered surface is configured with a first taperedsurface part 1 e making up a sizable proportion thereof (it extends from the motor-insertion opening side toward the deep recess-portion of the motor casing) and a secondtapered surface part 1 f following the first taperedsurface part 1 e at the deep recess-portion. - The slope of the second
tapered surface 1 f is larger than that of the firsttapered surface 1 e. When themotor 7 is fully inserted into themotor casing 1 b, the rear end of themotor 7 is positioned at the non-taperedinner surface part 1 c between the second taperedsurface part 1 f and the rear end (inner bottom) 1 h of themotor casing 1 b as shown inFIGS. 1 and 3 . The non-taperedinner surface part 1 c is formed in a straight cylindrical-inner surface shape. - As shown in
FIG. 3 , there is a gap between the outer surface of themotor 7 and the motor casing-inner surface comprising the first taperedsurface part 1 e, the second taperedsurface part 1 f and the non-taperedinner surface part 1 c. The sum R1 of outer diameter of the motor-body 7 and the height at the highest points of the curved outer surfaces of thebent pieces 7 c before the bent pieces (elastic pieces) are elastically deformed is larger than the inner diameter R2 at a halfway point “P” on the second taperedsurface part 1 f. But the sum diameter R1 is smaller than the inner diameter R3 at any point of the range from the first taperedsurface part 1 e up to a position immediately before the halfway point “P” of the second taperedsurface part 1 f. Accordingly, thebent pieces 7 c come into contact with the secondtapered surface 1 f immediately before themotor 7 is fully inserted into themotor casing 1 b as shown inFIG. 3 (3). Then, as themotor 7 is fully inserted into themotor casing 1 b, thebent pieces 7 c are pressed down by the second taperedsurface part 1 f and are elastically deformed in the inner radial direction of the motor. - Because the
bent pieces 7 c have a curved outer surface, their curved outer surfaces comes into contact with the secondtapered surface 1 f of themotor casing 1 b and, thus, thebent pieces 7 c are pressed down. - A
motor guide 1 d for guiding motor inserting are formed in the vicinity of the motor-insertion opening 73 of themotor casing 1 b. As shown inFIG. 2 , themotor guide 1 d is configured by plural guide projections formed in the vicinity of the motor-insertion opening 73, and have arc-shaped inner faces respectively. The end on the output-shaft side of themotor 7 is restrained in the radial direction by the ark-shaped inner face of themotor guide 1 d (for example, apart 7 b′ (seeFIG. 2 ) of a motor-mountingflange 7 b of themotor body 71 are put into contact with the arc-shaped inner faces of themotor guide 1 d).Parts 7 b″ (the parts made longer than thepart 7 b′ in the radial direction) of theflange 7 b are positioned betweenmotor guide projections 1 d. Eachparts 7 b″ has a screw-through hole 80 (seeFIG. 2 ), and themotor 7 is secured to thethrottle 1 by screws using the screw-through holes 80. - The
parts 7 b′ (having smaller diameters than theparts 7 b″) of theflange 7 b are clearance-fitted into the motor-guide (flange guide) 1 d immediately before themotor 7 is fully inserted into themotor casing 1 b. Thus, the end on the output-shaft side 72 of themotor 7 is fixed in its radial direction. - By referring to
FIG. 3 , the process of mounting themotor 7 into themotor casing 1 b will be described below. - In
FIG. 3 , the reference sign “L1” is a distance from a point p1 to the end of the motor guide projections (motor guide) 1 d. The point P1 is a point where elastic pieces (bent pieces) 7 c of themotor 7 first come into contact with the secondtapered surface 1 f during the motor insertion process. “L2,” is a distance from the point “P” to theflange 7 b on the output-shaft side. L1 is equal to or larger than L2). - As the
motor 7 is inserted into themotor casing 1 b, themotor 7 moves from the position shown inFIG. 3 (1) (the position before thebent pieces 7 c reach the contact point “P”) to the position shown inFIG. 3 (2).FIG. 3 (2) shows the position of themotor 7 immediately before it is fully inserted into themotor casing 1 b, namely the position of themotor 7 where thebent pieces 7 c reach the contact point “P” on the secondtapered surface 1 f. At the time, because L1 is not shorter than L2, the outer edge of theflange 7 b (the end on the output side of the motor) is clearance-fitted into inner faces of themotor guide projections 1 d. - Thus, in the step of inserting the
motor 7 into themotor casing 1 b shown inFIG. 3 (2), themotor flange 7 b is supported by themotor guide projections 1 d. On the other hand, the center of theend 74 opposite to the output-shaft side of themotor 7 is aligned with the center of themotor casing 1 b by thebent pieces 7 c coming into contact with the secondtapered surface 1 f. - Then, when the
motor 7 is fully inserted into themotor casing 1 b, thebent pieces 7 c are pressed down by the secondtapered surface 1 f and, then, by the non-taperedinner surface 1 c as shown inFIG. 3 (3) and are elastically deformed (flexibly deformed) inwardly of the radial direction of the motor. Thus, thebent pieces 7 c partially enter thenotches 75 and therear end 74 of themotor body 71 is firmly held in theinner surface 1 c of the motor casing by the elasticity (springy force) of the pressed-downbent pieces 7 c. - In the above step of full insertion, the
motor flange 7 b is guided by themotor guide projections 1 d; therefore, themotor 7 is fully inserted into themotor casing 1 b correctly. - Thus, the precision in assembling the
motor 7 and vibration resistance of themotor 7 are improved. Besides, as thebent pieces 7 c and themotor 7 are formed as a single piece, the number of parts is relatively small and the assembling process of themotor 7 is relatively simple. Moreover, because theelastic pieces 7 c have a curved outer surface and the halfway parts of curved outer surfaces are pressed down by the secondtapered surface 1 f (inside of the casing), theelastic pieces 7 c do not scrape the inside of themotor casing 1 b, producing no metal scraps. - FIGS. 4 to 8 are partially sectional views of other embodiments of the present invention. The same reference numerals and signs commonly used between FIGS. 1 to 3 stand for the same components and elements. The differences from the first embodiment will be described below.
- In
FIG. 4 , themotor body 71 as a yoke is provided withelastic pieces 7 e. Theelastic pieces 7 e such as lugs are formed by cutting and raising parts of theyoke 71 of themotor 7. As in the case of the first embodiment, theelastic pieces 7 e are arranged in a circumferential direction of theyoke 71. The relation between “L1” and “L2” of the first embodiment that “L1” is not shorter than “L2” holds true in this embodiment. - In
FIG. 5 , theyoke 7 is fitted with a ring (apart different from the yoke) 7 f′ with elastic pieces (flexible pieces like plate springs) 7 f. The elastic projections (lugs) 7 f are formed and arranged in a circumferential direction of thering 7 f′ by cutting parts of thering 7 f′ in the shape of a lug and raising them. - In
FIG. 6 , the bearingboss 77 at the rear end of themotor 7 is fitted with aring 7 g′ withelastic pieces 7 g (or elastic projections). Thisring 7 g′ has the same workings and effect as the rings of the other embodiments. In this embodiment, the contact point “P” of theelastic pieces 7 g is somewhere on the inner surface of theboss 77. Also, the previously described relation between “L1” and “L2” that “L1” is not shorter than “L2” holds true in this embodiment. Thus, the present embodiment has the same workings and effect as those of the previously described embodiments. -
FIGS. 7 and 8 show other embodiments. InFIG. 7 , one end of theyoke 7 is provided with acircumferential groove 79, and an O-ring (elastic member) 15 a is fitted therein. The O-ring has the same effect as that of the previously described elastic pieces. The previously described relation between “L1” and “L2” that “L1” is not shorter than “L2” also holds true in this embodiment. - In
FIG. 8 , the bearing boss 78 at the rear end of theyoke 7 is provided with acircumferential groove 79′, and an O-ring 15 b is fitted therein. In this embodiment, the contact point “P” of the O-ring 15 b is somewhere on the inner surface of the boss 78. The previously described relation between “L1” and “L2” that the L1 is not shorter than “L2” also holds true in this embodiment. Further, the present embodiment has the same workings and effect as those of the previously described embodiments. In addition to metal materials, the elastic pieces, rings, etc. may be made of synthetic resin. The present invention is not limited to the above embodiments, and various types of elastic pieces, elastic projections, etc. are applicable. - According to the present invention, a throttle device and a motor therefor in which vibration resistance of the motor and the precision in assembling the motor (precision of alignment of the motor) are improved with simple configuration can be provided.
Claims (14)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/014921 WO2005049991A1 (en) | 2003-11-21 | 2003-11-21 | Throttle device and motor used for the throttle device |
Publications (2)
Publication Number | Publication Date |
---|---|
US20070069170A1 true US20070069170A1 (en) | 2007-03-29 |
US7469879B2 US7469879B2 (en) | 2008-12-30 |
Family
ID=34611324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/580,113 Expired - Lifetime US7469879B2 (en) | 2003-11-21 | 2003-11-21 | Throttle device and motor therefor |
Country Status (5)
Country | Link |
---|---|
US (1) | US7469879B2 (en) |
EP (1) | EP1701020B1 (en) |
JP (1) | JP4231050B2 (en) |
CN (1) | CN1878937B (en) |
WO (1) | WO2005049991A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070084439A1 (en) * | 2005-10-14 | 2007-04-19 | Aisan Kogyo Kabushiki Kaisha | Electronically controlled throttle valve system |
FR3014525A1 (en) * | 2013-12-11 | 2015-06-12 | Valeo Sys Controle Moteur Sas | VALVE BODY WITH OPTIMIZED HOUSING FOR RECEIVING AN ENGINE |
FR3014526A1 (en) * | 2013-12-11 | 2015-06-12 | Valeo Sys Controle Moteur Sas | VALVE BODY WITH OPTIMIZED HOUSING FOR RECEIVING AN ENGINE |
FR3058200A1 (en) * | 2016-11-03 | 2018-05-04 | Valeo Systemes De Controle Moteur | MOTOR CONTROL ACTUATOR AND FLUID CIRCULATION VALVE COMPRISING SAME |
FR3059060A1 (en) * | 2016-11-22 | 2018-05-25 | Valeo Systemes De Controle Moteur | DEVICE FOR MAINTAINING AN ELECTRIC MOTOR IN AN ACTUATOR BODY |
FR3074621A1 (en) * | 2017-12-01 | 2019-06-07 | Valeo Systemes De Controle Moteur | ELECTRIC MOTOR FOR MOTOR CONTROL ACTUATOR AND ACTUATOR COMPRISING SAME |
US20190195145A1 (en) * | 2017-12-27 | 2019-06-27 | Hyundai Kefico Corporation | Throttle valve assembly |
US11047349B2 (en) | 2017-08-09 | 2021-06-29 | Honda Motor Co., Ltd. | Intake structure of engine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4206920B2 (en) * | 2003-12-19 | 2009-01-14 | 株式会社デンソー | Actuator holding device |
JP2006097500A (en) * | 2004-09-28 | 2006-04-13 | Honda Motor Co Ltd | Throttle device of general purpose engine |
TWI484095B (en) * | 2011-11-23 | 2015-05-11 | Kwang Yang Motor Co | Engine throttle control structure |
JP7124792B2 (en) * | 2019-06-07 | 2022-08-24 | 株式会社デンソー | Cover device for motor terminals |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5868114A (en) * | 1995-01-17 | 1999-02-09 | Hitachi, Ltd. | Air flow rate control apparatus |
US5979405A (en) * | 1997-03-13 | 1999-11-09 | Unisia Jecs Corporation | Apparatus for controlling a throttle valve electronically in an internal combustion engine |
US6067958A (en) * | 1997-05-07 | 2000-05-30 | Hitachi, Ltd. | Throttle apparatus for an engine |
US20020171059A1 (en) * | 2001-05-15 | 2002-11-21 | Toru Sakurai | Throttle devices having motors supported by elastic, metallic support members |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS47607U (en) | 1971-01-19 | 1972-08-04 | ||
JPS5251976A (en) | 1975-10-24 | 1977-04-26 | Hitachi Ltd | Chatter time measuring system |
JPS52127616A (en) | 1976-04-19 | 1977-10-26 | Nippon Kokan Kk <Nkk> | Connecting method for socket and spigot joint with rubber ring |
DE4342949A1 (en) * | 1993-12-16 | 1995-06-22 | Bosch Gmbh Robert | Arrangement for clearance-free fixing of electric machine into casing |
JP2001346351A (en) * | 2000-05-31 | 2001-12-14 | Asmo Co Ltd | Motor and throttle actuator |
DE10138060A1 (en) * | 2001-08-03 | 2003-02-20 | Bosch Gmbh Robert | Throttle device with drive holder and drive contact |
JP4056724B2 (en) | 2001-10-01 | 2008-03-05 | 株式会社日立製作所 | Engine throttle device |
-
2003
- 2003-11-21 EP EP03819031A patent/EP1701020B1/en not_active Expired - Fee Related
- 2003-11-21 CN CN2003801107260A patent/CN1878937B/en not_active Expired - Fee Related
- 2003-11-21 WO PCT/JP2003/014921 patent/WO2005049991A1/en active Application Filing
- 2003-11-21 US US10/580,113 patent/US7469879B2/en not_active Expired - Lifetime
- 2003-11-21 JP JP2005510764A patent/JP4231050B2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5868114A (en) * | 1995-01-17 | 1999-02-09 | Hitachi, Ltd. | Air flow rate control apparatus |
US5979405A (en) * | 1997-03-13 | 1999-11-09 | Unisia Jecs Corporation | Apparatus for controlling a throttle valve electronically in an internal combustion engine |
US6067958A (en) * | 1997-05-07 | 2000-05-30 | Hitachi, Ltd. | Throttle apparatus for an engine |
US20020171059A1 (en) * | 2001-05-15 | 2002-11-21 | Toru Sakurai | Throttle devices having motors supported by elastic, metallic support members |
US6860466B2 (en) * | 2001-05-15 | 2005-03-01 | Aisan Kogyo Kabushiki Kaisha | Throttle devices having motors supported by elastic, metallic support members |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070084439A1 (en) * | 2005-10-14 | 2007-04-19 | Aisan Kogyo Kabushiki Kaisha | Electronically controlled throttle valve system |
US7428892B2 (en) * | 2005-10-14 | 2008-09-30 | Aisan Kogyo Kabushiki Kaisha | Electronically controlled throttle valve system |
FR3014525A1 (en) * | 2013-12-11 | 2015-06-12 | Valeo Sys Controle Moteur Sas | VALVE BODY WITH OPTIMIZED HOUSING FOR RECEIVING AN ENGINE |
FR3014526A1 (en) * | 2013-12-11 | 2015-06-12 | Valeo Sys Controle Moteur Sas | VALVE BODY WITH OPTIMIZED HOUSING FOR RECEIVING AN ENGINE |
WO2015087009A1 (en) * | 2013-12-11 | 2015-06-18 | Valeo Systemes De Controle Moteur | Valve body comprising a housing optimised for receiving a motor |
WO2015087010A1 (en) * | 2013-12-11 | 2015-06-18 | Valeo Systemes De Controle Moteur | Valve body comprising a housing optimised for receiving a motor |
FR3058200A1 (en) * | 2016-11-03 | 2018-05-04 | Valeo Systemes De Controle Moteur | MOTOR CONTROL ACTUATOR AND FLUID CIRCULATION VALVE COMPRISING SAME |
FR3059060A1 (en) * | 2016-11-22 | 2018-05-25 | Valeo Systemes De Controle Moteur | DEVICE FOR MAINTAINING AN ELECTRIC MOTOR IN AN ACTUATOR BODY |
US11047349B2 (en) | 2017-08-09 | 2021-06-29 | Honda Motor Co., Ltd. | Intake structure of engine |
FR3074621A1 (en) * | 2017-12-01 | 2019-06-07 | Valeo Systemes De Controle Moteur | ELECTRIC MOTOR FOR MOTOR CONTROL ACTUATOR AND ACTUATOR COMPRISING SAME |
US20190195145A1 (en) * | 2017-12-27 | 2019-06-27 | Hyundai Kefico Corporation | Throttle valve assembly |
US10859005B2 (en) * | 2017-12-27 | 2020-12-08 | Hyundai Kefico Corporation | Throttle valve assembly |
Also Published As
Publication number | Publication date |
---|---|
CN1878937B (en) | 2010-09-29 |
EP1701020A4 (en) | 2010-07-07 |
JPWO2005049991A1 (en) | 2007-06-14 |
CN1878937A (en) | 2006-12-13 |
EP1701020B1 (en) | 2012-03-21 |
US7469879B2 (en) | 2008-12-30 |
EP1701020A1 (en) | 2006-09-13 |
WO2005049991A1 (en) | 2005-06-02 |
JP4231050B2 (en) | 2009-02-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7469879B2 (en) | Throttle device and motor therefor | |
US5687691A (en) | Throttle device and method for producing a throttle device | |
EP2141785A2 (en) | Sensor magnet holder, motor having the holder incorporated therein, and method of manufacturing the motor | |
KR20080026565A (en) | Electric motor and gearing/drive unit for actuators in a motor vehicle | |
JPS5929765A (en) | Gear rotor type fuel pump | |
KR100790670B1 (en) | Supporting device for actuator received in housing | |
WO2009037019A1 (en) | Pump rotor for a canned motor pump | |
JP2004187378A (en) | Motor with reduction gear | |
JP2001157405A (en) | Thrust cap | |
JP2005133655A (en) | Throttle control device for internal combustion engine | |
KR20050051712A (en) | Motor | |
JP4119294B2 (en) | Step motor and flow control valve equipped with the step motor | |
KR100740704B1 (en) | Motor assembly | |
KR100868711B1 (en) | Mount for connecting automotive fan motor to housing | |
CN102472327B (en) | Bearing device | |
KR100483234B1 (en) | Fuel pump | |
JPH0567168U (en) | Motor casing structure | |
JP2005527729A (en) | Connecting member for fuel pump | |
JP6529673B2 (en) | Automotive actuator | |
KR20040032773A (en) | Motor driven throttle control device and method of mounting motor thereto | |
CN108930619B (en) | Fuel supply device | |
EP1400701B1 (en) | Water pump | |
CN112771734A (en) | Windshield wiper motor and method of assembling a windshield wiper motor | |
JP4065250B2 (en) | Electric fuel pump device | |
KR101067740B1 (en) | Step motor actuator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HITACHI, LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AOKI, SADAYUKI;REEL/FRAME:017925/0284 Effective date: 20060515 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1553); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 12 |
|
AS | Assignment |
Owner name: HITACHI AUTOMOTIVE SYSTEMS, LTD., JAPAN Free format text: DEMERGER;ASSIGNOR:HITACHI, LTD.;REEL/FRAME:058960/0001 Effective date: 20090701 |
|
AS | Assignment |
Owner name: HITACHI ASTEMO, LTD., JAPAN Free format text: CHANGE OF NAME;ASSIGNOR:HITACHI AUTOMOTIVE SYSTEMS, LTD.;REEL/FRAME:058481/0935 Effective date: 20210101 |